Zoetis Inc. ($ZTS) experienced a 6% decline in its stock price after initially erasing premarket gains. The company has adjusted its full-year earnings per share (EPS) guidance to a range of $5.86 to $5.92, down from the previous estimate of $5.78 to $5.88. This revision comes as the company continues to navigate market fluctuations. Meanwhile, another stock, $RZACK, has shown volatility, with one investor reporting a significant loss of $20 million despite a prior increase in value, suggesting a potential reversal from recent lows.